# Copyright 2018 Alibaba Cloud Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import datetime
import time


def epoch_time_to_timestamp(epoch_time):
    epoch_time += time.timezone
    return datetime.datetime.fromtimestamp(float(epoch_time)).strftime('%Y-%m-%dT%H:%M:%SZ')


def timestamp_to_epoch_time(timestamp, time_format="%Y-%m-%dT%H:%M:%SZ"):
    return time.mktime(
        datetime.datetime.strptime(timestamp, time_format).timetuple()
    ) - time.timezone
